Monitoring earbud



FIG. 1 is a front perspective view of a monitoring earbud, showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a rear plan view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a front plan view thereof, opposite that shown in FIG. 3;

FIG. 6 is a second side view thereof, opposite that shown in FIG. 4;

FIG. 7 is a third side view thereof; and,

FIG. 8 is a fourth side view thereof, opposite that shown in FIG. 7.

The broken lines shown herein are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a monitoring earbud, as shown and described. 